TTL pulse

[David Moore]

Dear all,

I've written a script to present attentional tasks to participants however 
I need to send a TTL pulse to an external device at random intervals.

I'm using eprime 2 and I have added the parallel port in the devices and 
left the standard settings. I've then put in an inline with the command 
WritePort &H378, 255 however I am not getting any pulse.

Can anyone help?

Dave

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